Postmouse
I discovered this free game on Steam over the weekend. It's a charming little adventure of a humble post-mouse going out into the forest to deliver the mail.
It was made by a group of Danish students called Critter Collective. It features platforming and puzzle-solving as the primary game mechanics. In total, it probably takes around 1.5-2 hours to complete the main story, maybe a little longer if you search for all of the collectables.
The atmosphere gives off a strong Redwall-esque vibe, and I highly recommend everyone give it a try.
From the creators:
"From the students of the Animation Workshop, Postmouse is a third-person single-player puzzle platforming game about a timid mouse who has to go on their first adventure to deliver mail. Having always dreamt of the world beyond their little post-office, Postmouse is emboldened to enter the great unknown. Meet charming animals, solve precarious puzzles and explore ruins of a time long past on your mission to deliver letters to those waiting to hear from their loved ones. "